You can capture the value of an element on the page (either hidden or displayed) by creating a rule with Type Javascript.
First you need to identify the ids of the element that has the text you want to copy, and the element/field you want to fill:
right-click on each of these on the screen and select Inspect - the element will be highlighted so you just need to note the id (look for id="??????")
Now create your rule with Type= Javascript
Option 1 : copy the text with no change:
var myText = document.getElementById('id_of_text_you_are_copying').value;
document.getElementById('id_of_text_you_want_to_fill').value = myText;
Option 2: copy the text prefixed by the text "Ad name: ":
var myText = document.getElementById('id_of_text_you_are_copying').value;
document.getElementById('id_of_text_you_want_to_fill').value ="Ad name: " + myText;